The above waterline sub-assembly of the Class 2 Buoy ready for assembly of the remaining component parts. The steel framework has to be strong enough to withstand a great deal of battering from tidal and weather influences but not so heavy that it impairs buoyancy; it is a complex finite element analysis model and requires a great deal of knowledge and skill to apply the forces likely to be encountered by the structure during its lifetime. [108] [273]

The floatation chambers bolted carefully together and incorporating that steelwork to which the anchor chain and support for the upper assembly with its complex solar powered systems. The design, structural analysis and design verification was undertaken at Rota Design Limited by Martin and myself. [108] [273]